Getting the Right Power: 15 PC Power Supply Units

Page 5 of 29:

Testing

The performance capacity of the power supply unit is measured with a special measurement platform: the power consumption of typical components in a PC is simulated with resistive loads. When the resistance applied to +3.3-, + 5- and +12-volt lines is reduced, the power consumption and thus energy use increase when output power remains constant. The basis of the power test is the power that the PC components of a high-end system cause the strands of the +3.3-, + 5- and +12-volt power bus to use, expressed in percentage values.

Swipe to scroll horizontally

Components	+3.3 Volt	+5.0 Volt	+12.0 Volt	Number	Achievement
Processor AMD Athlon XP 3000+. 1.65 V	Row 0 - Cell 1	Row 0 - Cell 2	7.73 A	1	92.76 W
Mainboard and onboard-devices	3.00 A	2.00 A	0.30 A	1	23.50 W
System Fan	Row 2 - Cell 1	Row 2 - Cell 2	0.25 A	1	3.00 W
CPU-fan	Row 3 - Cell 1	Row 3 - Cell 2	0.25 A	1	3.00 W
Memory-module and -electronics(128 MByte DDR-DIMM)	Row 4 - Cell 1	2.00 A	Row 4 - Cell 3	4	40.00 W
AGP-Graphic Card	6.00 A	2.00 A	Row 5 - Cell 3	1	29.80 W
PCI-Modem	Row 6 - Cell 1	0.50 A	Row 6 - Cell 3	1	2.50 W
PCI-Sound	0.50 A	0.50 A	Row 7 - Cell 3	1	4.15 W
PCI-LAN	0.40 A	0.40 A	Row 8 - Cell 3	1	3.32 W
IDE-Hard Drive	Row 9 - Cell 1	0.80 A	2.00 A	4	112.00 W
DVD-Drive	Row 10 - Cell 1	0.65 A	0.85 A	1	13.45 W
DVD-R/RW-Drive	Row 11 - Cell 1	0.85 A	0.75 A	1	13.25 W
Floppy	Row 12 - Cell 1	0.80 A	Row 12 - Cell 3	1	4.00 W
USB-Devices	Row 13 - Cell 1	0.50 A	Row 13 - Cell 3	2	5.00 W
IEEE 1394	Row 14 - Cell 1	1.60 A	Row 14 - Cell 3	1	8.00 W
Keyboard	Row 15 - Cell 1	0.25 A	Row 15 - Cell 3	1	1.25 W
Mouse	Row 16 - Cell 1	0.25 A	Row 16 - Cell 3	1	1.25 W
Total Power Consumption	32.67 W	110.00 W	217.56 W	Row 17 - Cell 4	360.23 W